Unions provide apprenticeship programs and worker safety and health training. Unions are the only means whereby the commodity of labor (and face it, corporations view labor as a commodity not an asset) can get a fair shake in the free wheeling universe of modern American Capitalism.
Unions provide for fairness in pay, benefit, health and safety and many other work place issues.
I understand why Conservatives hate labor. They have been indoctrinated to think that way. The corporate shills they read and listen to are paid by those who want to wring every once of productivity out of a human and then toss it aside like so much scrap. They don't want a prosperous Middle Class anymore. They want bigger stock prices.
Unions force a work environement where the best trend to the least acceptable.
Jim and Joe both get 6 sick days.
Jim uses all of them...3 as additional vacation days.
Joe uses only 3 of them....and loses the other threee...but hey...he was onlyh sick 3 days.
They both get the same raise per union contract.
Next year both Jim AND Joe use all of their sick days, even though neither one wa s sick for more than 3 days.